There was no definition of either this, or of the preceding genus, in
the written catalogue.
N. POMPILIUS. _N._ apertura cordata, anfractibus contiguis.
The unprinted synonyms were "Bonan. 1, f. 1, 2," "Breyn. Polyth. 14,"
"Pet. Amb. t. 3. f. 7," "Pet. Gaz. t. 99. f. D," "Klein, 2. t. 1. f. 1,
2," and "Bellon. Aquat. 318. t. 382." Seba was not quoted.
N. SPIRULA. _N._ apertura orbiculari, anfractibus distantibus.
The I in the reference to Rumphius was a misprint for the written 1;
"Bon. 1. f. 39," "Breyn. Polyth. 21. f. 2," "Klein, 5. t. 1. f. 6," and
"Petropol. Mus. 532. n. 6," were the unprinted synonyms: "tubo" was an
emendation.